Antonyms of adj excitatory

1 sense of excitatory

Sense 1
excitant, excitative, excitatory -- ((of drugs e.g.) able to excite or stimulate)

INDIRECT (VIA stimulative) -> depressant -- (capable of depressing physiological or psychological activity or response by a chemical agent)

Similarity of adj excitatory

1 sense of excitatory

Sense 1
excitant, excitative, excitatory -- ((of drugs e.g.) able to excite or stimulate)
       => stimulative (vs. depressant) -- (capable of arousing or accelerating physiological or psychological activity or response by a chemical agent)